The Franklin ArmoryA(R) BFSIIIA(R) Equipped M4-HTF(TM) XTD R3 is the third edition of the Franklin M4-HTF lineup. This M4 is more than ready for any situation that Hits The Fan. The XTD version comes with a 16" lightweight contour barrel topped off with our recoil mitigating AuraA(R) Muzzle Break. While the FSR Handguard offers a multitude of attachment points for your accessories. Barrel Length + Type: 16" LTW Contour Handguard/Upper: 15" FSR(TM) M-Lok Sights: Optic Ready Twist: 1:7" Charging Handle: Mil-spec Bolt Carrier: Salt Bath Nitride Lower: FAI-15(TM) Trigger:Custom Tuned Trigger Gas System: Mfg: Franklin Armory